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Q.

Aqueous NaOH solution is labelled as 10% by weight. Mole fraction of the solute in the solution is

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a

0.05

b

0.0476

c

0.052

d

0.52

answer is B.

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Detailed Solution

w/w% of aq. NaOH =10%   WNaOH =10g , Wsolution. =100g     Wwater=(100-10) = 90gXNaOH=nNaOHnH2O+nNaOHXNaOH=10409018+1040XNaOH=121=0.0476
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